Automatic speed control.



T. BROWN.

AUTOMATIC SPEED CONTROL. APPLICATION FILED mic. 26, 1907.

977,703. Patented Dec.6, 1910.

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AUTOMATIC srrinn common.

Be it known that. I, THEOPHILUS BROWN, residing at Worcester, in the county of orcester and Commonwealth of -M assachusetts, have invented' a new 'and useful Improvement "in electric wiring-ofian explosion motor, with} Automatic Speed Control, of which the fol-,

lowing. is a specificatioh, accompahied by drawings form-ipga part of the .same, in

which-- Figure 1 is a diagrammatic view of the the parts of the motor in peigspeotive and the speed dial in ,enlarged front view; 'Fig; 2 is a detached view of the circuit breaking ring on ,the speed dial, in Fig. 1, and Fig$3 \is a sectional view of the same on line 3- 3,

, Fig. 1, with the-connecting'wires omitted.

\ spee" control for 'an explosion engine, and

Similar reference letters and figures refer to similar parts in the different views.

' M invention relates .to an automatic is more especially designed for use\ in automobiles, the object being to enable the limit of the speed of an automobile tobe set at a definite oint and to reduce. automatically the spee Q of themotor whenever that point p "is reached.

. ,My' invention comprises means for preventing the formation of an electric spark in the c linder of the motor during the entire period in which the automobile e rceeds the predetermined s ee'd, and it consists n the construction an .arran ementof; parts as hereinafter described an pointed out in the annexed claim.

Referring to the accom' anying drawings A represents a two cylin er motor, having spark plugs 1, 1, connected by wires a, a, withthe induction coil B, whichis connected by wires b, b,with one pole of batteries G E is a circuit closerarr anged to govern the time of the 'roduction ofthe spark inthe cylinder A tiirough thespark plugs 1,12; Fis the change speed device provided with a lever 2, and compartments 3, 4, 5 and. 6 to receive the lever 2 when the .engine' is connected through different gears The, compartment 6. receives the lever 2 at the highest-speed, the compartments'4 and 5 at lower speeds and the compartment 3 at reverse.

he lever 2'stands in'the drawings in the speed compartment 6. L

having 'acase 7 and graduated face 8 supv s ec aoauon'bt'nemr 1 mm.- P t nt d D 6, 1910,

Application filed December 28, 1907. sw rm. 4os,ose.

.All the above. mechanism is of the ordinary and well known construction not be further described.

Swingingover'the dial face 8 is an indi-L eating-pointer 9 having a collar 10 mounted and will on a sleeve 11 on a stud 12. ,The sleeve 11 "is rotated through gearing, not shown, and

the automobile, which movementjis indicated by, the pointer 9 in the usual manner in speed indicatinginstruments. constructed of insulatin material, as shown v in Fig. 3, and provide on. a portion of its. upper surface with a metal plate 14, is supported by a di-ametrical arm 15 attached to is attached an arm 16 provided with an indicatm finger 17 overlapping theedge of the dial ace 8, and frictionally held against the edge of the case7. Movement of the finger its movemeiit corresponds with the speed'of A ring- '13 1o the stud 12. To the lower end of the stud 12 17 will cause the movement of the arm 16,

land the consequent change in relative position of any point on the ring pointer 9. From the other pole of the bat- ;eries in anordinary motor, wires are con- .nection'for the roduction of a spark at the spark plugs. n my present device I con- 7 meet /the other pole of the batteries with the cylinders through the speedometer G as f0lthe insulated switch H and the lever 18 of the switch H, as shown in Fig. 1, is arranged position upon the contact with the with the wire an- The 9 licted toathe cylinders to complete the con-' lows :Wires 0 and d lead to the lever 18 of" tob'e held, when the change speed lever 2 is passes through the lev'er18 and contact point V s19'to wire .21, the other end of which is electricallyconnected with the metal plate 14 on, thering 13. A wire y is electrically connected to the eollar'lO and to the cylinders at I, with the opposite end of the wire'g con- 7 nected with the contact point 20.

I connect electrically the collarltl tofthe :plate 14 by an arm 21 pivoted on the end of indicator 9 and held in electrical contact with the ring 13 by a spring 22. This com-h pletes. ,theconnection and thev electricity from wiresc and'd passes to the cylinder at c. I throughlever 18, contact point 19, wire :2,

plate 14, arm 21,,4indicator 9, collar 10 and wire y. setting the finger 17 at any, de-

sired speed limit, the .ring 13 is thereby turned so that the arm 21 is drawn from the plate l i onto the insulated ring 153 when the indicator 9, moving in the direction indi ment of the indicator lever 9, in the opposite.

cated by the arrow 9 in Fig.1, reaches the speed limit at which the finger 1 7 is set, and the connection through the arm 21 between wires 00 and 3 and between the batteries and the cylinder is thereby broken. As the electricity is now out off from the cylinders the motor runs by its own momentum, until by the decrease in speed andconsequent movetion of the change speed lever 2 in the high speed compartment in contact with the spring actuated arm 28 of the lever 18. hen the change speed lever- 2 is thrown from the high speed compartment 6, the

spring 24 throws the switch lever onto the contactpoint 20, from which the wire yleads directly to the cylinder at I. In running the motor with low speed connection the finger 17 can be set at a. speed which will insure a break in the electrical connection between the wires 02 and y at the ring 13, but even if connection at the ring-should occur the other end of the wire a: would be dead at the insulated contact point 19. So that when the switch lever 18 is in contact with the point 20, the qnlyelectric circuit possible is directly to the cylinders at I through the wire y.

- The course of the electric current to form the ignition spark in my improved speed contact'is as follows From one pole of the battery wires 6, b, and a, a, leadi through the induction .coil to the spark plugs. From the other pole. of'the battery, when the high speed gear is connected, wires 0 and d lead through the contact point 19 and the wire a:

the metal plate 14. The metal plate 14 is electrically connected when the speed is not above the predetermined limit through the arm 21, collar 10 and 'wire y to the cylinder I, thereby completing the electrical circuit. \Vhen the indicator 9 is above the limit of speed, the arm 21 is drawn from the plate 14 and the circuit to the cylinder is broken, to be resumed when the indicator 9 returns below the indicated speed limit, and the connection is reestablished through the arm 21. hen the change speed lever is not in the notch for high speed, the course of electricit-y from the wires 0 and d is through the contact point QOdirectly to the cylinders at I and my speed control is inoperative.

I claim, 7

In a speed control for explosion engines, the combination with an indicator for indicating the speed of a vehicle, means on said indicator for opening an electric circuit for preventing the formation of a spark in the cylinder of the engine to reduce the speed of the engine, a change speed lever arranged to occup different positions corres ondin to the different speeds of said vehlcle an means acting automatically for cutting said indicator out of said circuit except when said lever is in the position of highest speed.

THEOPHILUS BROWN.

' Witnesses;

HENRY Woon FOWLER, PENELOPE OOMBERBACH. 

